It's up to you, but I would say this.....
This isn't just a third party stick you can pick up to play the game. This is a pack-in stick for hardcore fans. That means the game was designed to work with it. There will be nothing awkward on it, the moves should have been designed to be pulled off with a stick.
I'm way partial to sticks. They are so fricking precise. Especially because this MK is a return to MK's roots, which means there's going to be lots of jumping. On a d-pad, I always jump straight up when I mean to jump toward my opponent. None of that with a stick, the diaganols are pure precision.
Also, think about all the buttons on a pad. You're basically using your thumb to be responsible for 4 buttons. That means you have a wider variety of choices that your brain has to parse to your thumb. When you play with a stick, you have your entire hand to dedicate to the buttons. That means your index finger only has to worry about 2 punch buttons, your middle finger only has to worry about block, and your ring finger has the two kick buttons to focus on. It sounds simple, but when each finger has less to do, you do it faster.
You'll also be amazed at how much easier it is to pull off roll moves. In fact, there is no pulling them off....they just happen, each and every time you try to do them. There's none of that garbage when you try to do something but miss it, you get it every time you try because that's what the game was built around. Since you grew up with pads, maybe you feel that way about them, but I'm constantly missing moves on pads.
Also, you're not clutching a pad with your hands. So you get fewer hand cramps and can play longer, and no hand sweat!
This is all based on my experience in the arcade. I'm giving the TE stick a lot of credit and assuming it's going to be as good as the old Midway arcade sticks. Thus far, I haven't had very good luck with home arcade sticks, but I'm giving this one the benefit of the doubt. If it's what it is supposed to be, I really think you'd be making a horrible decision not to get it. The only reason not to get it is if you can't afford it.